Russia will recommend using the domestically-made Sputnik Light vaccine against COVID-19 only as a booster for people who have already been vaccinated, Russian news agencies cited the health minister as saying on Saturday.Russia had previously promoted Sputnik Light, which comprises the first shot of its flagship two-shot Sputnik V, as an effective standalone vaccine as well as a booster that can be combined with non-Russian vaccines.“As the Delta variant is advancing, there will definitely be changes made today to the methodological recommendations on vaccinations where it will (say): only use ‘Sputnik Light’ for re-vaccination,” Health Minister Mikhail Murashko was quoted as saying by TASS.